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Add 21/80 and 15/8

1st number: 21/80, 2nd number: 1 7/8

21/80 + 15/8 is 171/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 8 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 80 × 1 = 80,
    21/80 = 21 × 1/80 × 1 = 21/80
  3. Likewise, for the 2nd fraction, since 8 × 10 = 80,
    15/8 = 15 × 10/8 × 10 = 150/80
  4. Add the two like fractions:
    21/80 + 150/80 = 21 + 150/80 = 171/80
  5. So, 21/80 + 15/8 = 171/80
    In mixed form: 211/80

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